Electrical Formula Multiple Choice Questions

Education Journalist | Study Abroad Lead

Electrical Formula MCQs cover all important formulas such as Charge, Capacitance, Inductance, Resistance, Power, and others. Among the list of formulas, the most commonly used electrical formulas are related to voltage, current, power, and resistance. Here is a list of Important Electrical Formulas covered in the article:

Electrical Formulas

Electrical Formulas

Discover about the Chapter video:

Current Electricity Detailed Video Explanation:

Ques 1: The rate at which an electric type charge is converted from electrical energy to mechanical or other forms of energy then it is represented as____

Electric power
Mechanical power
Chemical energy
Magnetic energy

Click here for the answer

Answer: The correct answer is a. Electrical Power

Explanation: The rate at which an electric type charge is converted from electrical energy to mechanical or other forms of energy then it is represented as electrical power.

Ques 2: The relation between Power, Resistance, and Current is____

P=I²/R
P=I²R
P=VI²
None of the above

Click here for the answer

Answer: The correct answer is b. P=I²R

Explanation: In P = I2 R, Power is directly proportional to Resistance ( Current Constant throughout the circuit ).

Ques 3: Under no-load conditions, the transmission line carrying a current because of

Heating effect
Capacitance effect
Chemical effect
Transmission effect

Click here for the answer

Answer: The correct answer is b. Capacitance effect

Explanation: Under no-load conditions, the transmission line carries a current because of the capacitance effect. Under the no-load condition, the current in the line is due to the flow of charge only (Increase Ferranti effect), and the charging current is due to the formation of capacitance between the transmission line and the earth.

Ques 4: The opposing capacity of materials against the current flow is:

Conductance
Inductance
Susceptance
Resistance

Click here for the answer

Answer: The correct answer is b. Inductance

Explanation: The opposing capacity of materials against the current flow is resistance.

Ques 5: The phenomenon in which there is an induced current in one coil due to the current in a neighboring coil is?

Electromagnetism
Susceptance
Mutual inductance
Steady current

Click here for the answer

Answer: The correct answer is c. Mutual Inductance

Explanation: When there is a current in a coil, due to the magnetic field caused by the current there is currently induced in the neighboring coil as well. This is known as mutual inductance.

Read More:

Chapter Related Topics
Kirchhoff’s Rules	Wheatstone Bridge	Meter Bridge
Relation between Power and Resistance	Ampere	Circuit Diagram
Differences Between Acceleration and Velocity	Electrical Formula	Resistance Formula
Difference between Emf and Voltage	Relation between Resistance and Length	Combination of Resistors-Series and Parallel
Cells, emf, Internal Resistance	Cells in Series and in Parallel	Drift Velocity
Difference Between Ammeter and Voltmeter	Types of Current	Derivation of Drift Velocity
Current Electricity Important Questions	Zener Diode	Ohm’s Law And its Limitations
Static Electricity	Electrical Current	Resistor Colour Codes
Drift Velocity	Unit of Current	Unit of Voltage
Current Density	Electrical Resistance	Electromotive Force
Types of Resistors	Unit of Specific Resistance	Carbon Resistor

Ques 6: What is the SI unit of mutual inductance?

Ohm
Henry
Volt
Siemens

Click here for the answer

Answer: The correct answer is b. Henry

Explanation: Mutual inductance is the inductance between the two neighboring coils. Since it is a type of inductance, its unit is that of inductance, that is, henry.

Ques 7: The alternating current voltage have _______________

Phase
Neutral
Both a and b
None of the above

Click here for the answer

Answer: The correct answer is c. Both a and b

Explanation: The alternating current voltage has both phase and neutral. The three pins correspond to earth, neutral, and phase. The phase line is the one that carries current, the neutral line provides the return path to balance the flow of current, and finally earthing is purely used for safety purposes.

Ques 8: In which one of the following voltage the polarity is fixed?

AC voltage
DC voltage
Both a and b
None of the above

Click here for the answer

Answer: The correct answer is b. DC Voltage

Explanation: In DC voltage the polarity is fixed whereas in AC voltage the polarity is not fixed

Ques 9: In the series combination of two or more than two resistances

the current through each resistance is the same.
the voltage through each resistance is the same.
neither current nor voltage through each resistance is the same.
both current and voltage through each resistance are the same.

Click here for the answer

Answer: The correct answer is a. the current through each resistance is the same.

Explanation: In a series combination current across its circuit components is always and in a parallel combination the voltage across the circuit components is constant.

Ques 10: The speed at which the current travels in a conductor is near:

3 × 10⁴ ms^-1
3 × 10⁶ ms^-1
3 × 10⁸ ms^-1
3 × 10¹⁰ ms^-1

Click here for the answer

Answer: The correct answer is d. 3 × 10⁸ ms^-1

Explanation: In a conductor, the speed of the electric field is almost equal to c=3×10⁸m/s. Hence, this is the speed with which electric current travels in a conductor.

Though the drift speed is of the order of 10⁻³m/s and the speed of electrons is of the order of 10⁶m/s. The current starts flowing as soon as the electron starts drifting and hence the speed of the current is the same as that of the electric field is nearly 3×10⁸m/s.

Ques 11: A cell of e.m.f. ‘E’ and internal resistance r is connected in series with an external resistance nr. Then the ratio of the terminal potential difference to e.m.f. is

\(\frac{1}{n}\)
\(\frac{1}{n+1}\)
\(\frac{n}{n+1}\)
\(\frac{n+1}{n}\)

Click here for the answer

Answer: The correct answer is c. \(\frac{n}{n+1}\)

Explanation: \(i= \frac{E}{r+nr}= \frac{E}{(n+1)r}\)

Terminal difference of cell = \(V = E -ir=E- \frac{Er}{nr+r}\)

⟹\(V=\frac{Enr}{nr+r} = \frac{n}{n+1}\)

The ratio of V and E is \(\frac{n}{n+1}\)

Ques 12: The temperature coefficient of resistance of a wire is 0.00125 per degree Celcius. At 300K its resistance is 1 ohm. The resistance of the wire will be 2 ohms at the following temperature:

1100 K
854 K
1127 K
1154 K

Click here for the answer

Answer: The correct answer is a. 1100K

Explanation: Step 1: Applying Relation between Temperature and Resistance: R=R₀(1+α(T²−T¹))

Given Initial resistance at 300K is 1Ω.

Let temperature be T when final resistance becomes 2Ω

⇒ 2Ω=1Ω(1+0.00125(T−300K))

⇒ 1=5/4×10⁻³(T−300K)

∴ T=1100K

For Latest Updates on Upcoming Board Exams, Click Here: https://t.me/class_10_12_board_updates

Check-Out:

PCMB Study Guides
NCERT Solutions for Class 12 Physics	Class 12 Physics Notes	Formulas in Physics
Topics for Comparison in Physics	Choice-based questions in physics	Topics in relation to physics
Physics Study Notes	Class 12 Physics Book PDF	Class 12 Physics Practicals
Important Derivations in Physics	SI units in Physics	Important Physics Constants and Units
Class 12 Physics Syllabus	Mendeleev's Periodic Table	NCERT Solutions for Class 12 Biology
NCERT Solutions for Class 12 English	NCERT Solutions for Class 11 Chemistry	Class 12 Chemistry Practicals
Class 12 Chemistry Notes	Important Chemical Reactions	Class 12 Maths Notes
Class 12 PCMB Notes	NCERT Class 12 Biology Book	NCERT Class 12 Maths Book
NCERT Class 12 Textbooks	NCERT Solutions for Class 11 Maths	NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 12 Maths	NCERT Solutions for Class 11 Biology	NCERT Solutions for Class 11 English
NCERT Class 11 Chemistry Book	NCERT Class 11 Physics Book	NCERT Class 11 Biology Book
Class 11 Notes	Important Maths Formulas	Important Chemistry Formulas
Class 11 PCMB Syllabus	Chemistry Study Notes	Biology Study Notes
Periodic Table in Chemistry	Important Chemical Reactions	Comparison topics in Chemistry
Comparison Topics in Maths	Biology MCQs	Important Named Reactions
Maths MCQs	Comparison Topics in Biology	Chemistry MCQs

Electrical Formula Multiple Choice Questions

Current Electricity Detailed Video Explanation:

CBSE CLASS XII Related Questions

1.
Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

2.
If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.

3.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

4.
Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

5.
Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

6.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

Electrical Formula Multiple Choice Questions

Current Electricity Detailed Video Explanation:

CBSE CLASS XII Related Questions

1.Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

2. If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.

3.Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

4.Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

5.Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

6. Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

2.
If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.

3.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

4.
Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

5.
Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

6.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.