Electricity

• 1-A, 2-C, 3-B, 4-D

• 1-D, 2-A, 3-C, 4-B

• 1-C, 2-B, 3-D, 4-A

• 1-B, 2-D, 3-A, 4-C

• 1-A, 2-C, 3-B, 4-D

• 1-B, 2-D, 3-A, 4-C

• 1-C, 2-B, 3-D, 4-A

• 1-D, 2-A, 3-C, 4-B

• 1-A, 2-C, 3-B, 4-D

• 1-D, 2-A, 3-C, 4-B

• 1-C, 2-B, 3-D, 4-A

• 1-B, 2-D, 3-A, 4-C

• 1-D, 2-A, 3-C, 4-B

• 1-A, 2-C, 3-B, 4-D

• 1-B, 2-D, 3-A, 4-C

• 1-C, 2-B, 3-D, 4-A

The rate of electric energy loss in a thermal device due to resistance R is given by:

A. P = I²/R

B. P = V²/R

C. P = I²/V

D. P = V/I

• A and B

• B and C

• A and D

• A and C

Three bulbs of 100 W, 200 W and 60 W are connected in series to the main supply of 220 V. The current will be:

A. Equal in 100 W and 200 W.

B. Equal in 200 W and 60 W.

C. Different in all bulbs.

D. None of the above

• A,B and C

• B and D

• A and C

• A and B

Manganin is an alloy of:

A. Copper

B. Manganese

C. Nickel

D. Platinum

• A and C

• All of these

• A and B

• A, B and C

Which of the following statements is/are incorrect?

A. A neutron has a positive charge of + 1.6 × 10⁻¹⁹ C

B. An ammeter is a low resistance device.

C. Resistance of semiconductors decreases with temperature.

D. One ampere is equal to 10⁻⁶ uA.

• A, B and C

• A and D

• A and C

• A and B

Which of the following statements are correct about resistance?

A. Resistance of a conductor is directly proportional to the length.

B. Resistance of a conductor is directly proportional to the area of cross-section.

C. Resistance of a conductor depends on the nature of the material.

D. Resistance of conductor is inversely proportional to the length.

• A ,B and D

• A and C

• A and B

• A and D

Which of the following charges is possible?

A. 1.6 × 10−19C

B. 3.2 × 10−19C

C. 6.4 × 10−19C

D. 0.8 × 10−19C

• All of these

• A ,B and C

• A and C

• B and C