Physics 10 Chapter 14 - Current and Electricity - 14

Physics 10 Chapter 14 - Current and Electricity - 14

1. When we double the voltage in a simple electric circuit, we double the:

a) (c) Resistance
b) (a) Both a and b
c) (b) Power
d) (d) Current

2. The resistance of a conductor wire is 10 MΩ. If a potential difference of 100 volt is applied across its ends, then find the value of current passing through it in mA?

a) 100 mA
b) 0.1 mA
c) 0.01 mA
d) 10 mA

3. Electric potential and e.m.f.....................?

a) Are the same terms
b) Have different units
c) None of these
d) Are the different terms

4. What is ‘R’ in the ohm’s law; “V = IR”?

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

5. What is the SI unit of resistance?

a) Volt
b) Coulomb
c) Ohm
d) Joules

6. What is the symbol of ohm?

a) Symbol: Ω
b) Symbol: ε
c) Symbol: μ
d) Symbol: o

7. Ohm is the SI unit of..................?

a) Power
b) Resistance
c) Current
d) Voltages

8. If a graph is plotted between the current I and the potential difference V, what will be obtained?

a) A curved slope descending uniformly
b) A gradient’s slope
c) A curved slope ascending uniformly
d) A straight line

9. What is the property of a substance called that offers opposition to the flow of current flowing through it?

a) Potential difference
b) Resistance
c) Power
d) Current

10. In order to measure current through a resistance, which device is connected with the resistance?

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

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