1st Year Physics Chapter 9 TestElectrostatics and Current Electricity

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The resistance of an LDR:

   1. Increases with increase in light intensity

   2. Decreases with decrease in light intensity

   3. Remains constant regardless of light

   4. First increases then decreases

2. Kirchhoff's first rule is the manifestation of the law of conservation of:

   1. Mass

   2. Charge

   3. Energy

   4. Momentum

3. What is the main limitation of thermistor?

   1. They are very large in size

   2. They cannot work in circuit

   3. Their response is non-linear

   4. They are extremely expensive

4. The detection of galvanometer is proportional to:

   1. Voltage

   2. Resistance

   3. Current

   4. Power

5. LDRs are commonly made from:

   1. Silicon

   2. Germanium

   3. Cadmium sulphide

   4. Copper

6. A Faraday cage protects the interior from which of the following?

   1. Sound waves

   2. Gravitational waves

   3. Electromagnetic waves

   4. Light

7. The value of Coulomb's constant k in SI units is:

   1. 9 x 10⁹Nm²C^-2

   2. 9x10⁹NC²m^-2

   3. 9x10 N^-1m²C²

   4. 9x10 Nm²C²

8. The work done in moving a positive charge on an equipotential surface is:

   1. Finite and Positive

   2. Infinite

   3. Finite and Negative

   4. Zero

9. Magnetic effect of current is used in:

   1. Toaster

   2. Electric motor

   3. Electric iron

   4. DC battery

10. According to Kirchhoff's voltage law, the algebraic sum of all the p.d. in a closed loop is:

    1. Equal to the resistance

    2. Equal to zero

    3. Maximum

    4. Equal to the power