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Physics Form 3 Question Paper

Physics Form 3 

Course:Physics

Institution: Form 3 question papers

Exam Year:2011



Physics Form 3
Topic: Current Electricity.

1.What is the resistance of an electric circuit which draws a 2.5-A current from a 120-V source?

2.What resistance is required to limit the current in a circuit to 2 A when the applied voltage is 30 V?

3.What is the resistance of an electric stove element when a 5-A current through it causes a 110-V voltage drop across it?

4.What current will flow through a 20-O resistor connected across a 100-V source?

5.What current through a 250-O resistor will cause a voltage drop of 75 V across the resistor?

6.A 12-O heating element has a voltage drop of 98 V across it. What current is flowing through the heater?

7.What current will flow in a circuit whose total resistance is 17 O when it is connected to a 117-V source?

8.What voltage must be applied to a 15-O resistor to make it pass a 3-A current?

9.What is the voltage drop across a 125-O resistor when a 0.2-A current flows through it?

10.What voltage drop is produced by a 1.6-A current flowing through a 56-O resistor?

11.What applied voltage is required to cause current at the rate of 0.35 A in a circuit where the total resistance is 124 O?

12.A 0.00015 A current through a resistor in a radio reciever causes a 30-mV drop across it. What is its resistance?

13.What is the resistance of an ammeter whose full-scale reading is 10 A with a 30-mV drop across the meter?

14.What value of bias resistor is required for an amplifier in order to produce a 7-V drop across the resistor when the current through the resistor is 12 mA?

15.What value of resistor will draw a 32-mA current when connected to a 2.5-kV source?






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