Physics 10 Chapter 14 - Current and Electricity - 13

Physics 10 Chapter 14 - Current and Electricity - 13

1. What is measured by voltmeter, when it is connected directly with the terminals of battery?

a) Current
b) E.m.f
c) Potential difference
d) Resistance

2. Which of the following law states that; “The amount of current passing through a conductor is directly proportional to the potential difference applied across its ends”?

a) Joule’s law
b) Newton’s law
c) Ohm’s law
d) Coulomb’s law

3. According to ohm’s law, which of the following statement is TRUE?

a) Current is directly proportional to potential difference
b) Current is inversely proportional to e.m.f
c) Current is inversely proportional to potential difference
d) Current is directly proportional to e.m.f

4. Which of the following are the conditions for ohm’s law?

a) Temperature should increase gradually
b) Temperature should decrease gradually
c) Physical state of conductor changes uniformly
d) Temperature is constant

5. Which of the following are the conditions for ohm’s law?

a) Physical state of conductor changes slowly
b) Temperature should increase gradually
c) Physical state of conductor does not changes
d) Temperature should decrease gradually

6. Which device is used to measure all of these; Current, Potential difference and Resistance?

a) Multimeter
b) Ammeter
c) Ohmmeter
d) Voltmeter

7. According to ohm’s law, which of the following formula is TRUE?

a) V = IR
b) V = I / R
c) V = R
d) V = R / I

8. At 100,000 Ω, how much current flows through your body if you touch the terminals of a 12 V battery?

a) 120.2 x 10^-4 A
b) 12.0 x 10^-4 A
c) 120 x 10^-4 A
d) 1.2 x 10^-4 A

9. If your skin is wet, so that your resistance is only 1000 Ω, how much current would you receive from the 12 V battery?

a) 120 x 10^-2 A
b) 12.0 x 10^-2 A
c) 120.2 x 10^-2 A
d) 1.2 x 10^-2 A

10. What is the voltage across a 6 Ω resistor when 3 A of current passes through it?

a) 18 V
b) 9 V
c) 36 V
d) 2 V

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