**1.The voltage induced in an induct-or is represented as,**

A. product of its inductance and current through it.

B. ratio of its inductance to the current through it.

C. ratio of the current through it to its inductance.

**D. product of its inductance and rate of change of current through it.**

**2. Instantaneous power in induct-or is proportional to the**

**A. product of the instantaneous current and rate of change of current.**

B. square of instantaneous current.

C. square of the rate of change of current.

D Temperature of the induct-or.

**3. The unit of resistivity is**

A. Ω.

**B. Ω – meter.**

C. Ω / meter.

D. Ω / m².

**4. How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?**

A. 10

B. 60

**C. 600**

D. 1200

**5. The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be**

A. R Ω

B. 2R Ω

C. 4R Ω

**D. 8R Ω**

**6. The resistivity of the conductor depends on**

A. area of the conductor.

B. length of the conductor.

**C. type of material.**

D. none of these.

**7. If 1 A current flows in a circuit, the number of electrons flowing through this circuit is**

**A. 0. 625 × 10**** ^{19 }**B. 1.6 × 10

^{19}

C. 1.6 × 10-

^{19}

D. 0.625 × 10-

^{19}

**8. Which of the followings is/are active element?**

A. Voltage source

B. Current source

**C. Both**

D. None of these.

**9. If P is the power of a star connected system then what will be power of an equivalent delta connected system?**

A. P

**B. 3P**

C. P/3

D. None of the above

**10. Magnetic flux has the unit of**

A. Newton

B. Ampere-turn

**C. Weber**

D. Tesla