OHMS LAW


Question 1

A 10 mA current is measured in a 500 ohm resistor. The voltage across the resistor will be:

Question 2

A circuit has a total resistance of 100 ohm and 50 volt is applied across it. The current flow will be:

Question 3

If a 4800 ohm resistor is connected to a 12 volt battery, the current flow is:

Question 4

The current flowing through a resistor can be calculated by using the formula:

Question 5

A current of 2 ampere flows through a 16 ohm resistance. The applied voltage is:

Question 6

A current of 0.5 ampere flows through a resistance when 6 volt is applied. To change the current to 0.25 ampere the voltage must be:

Question 7

The following formula gives the resistance of a circuit:

Question 8

The voltage needed to cause a current of 4.4 ampere to flow in a 50 ohm resistance is:

Question 9

The ohm is the unit of:

Question 10

A current of 5 ampere in a 50 ohm resistance produces a potential difference of:

Question 11

The voltage across a resistor carrying current can be calculated using the formula:

Question 12

If a 12 volt battery supplies 0.15 ampere to a circuit, the circuit's resistance is:

Question 13

This voltage is needed to cause a current of 200 mA to flow in a lamp of 25 ohm resistance:

Question 14

I = U/R is a mathematical equation describing:

Question 15

The resistor which gives the greatest opposition to current flow is:

Question 16

The value of a resistor to drop 100 volt with a current of 0.8 milliampere is:

Question 17

A current of 0.5 ampere flows through a resistor when 12 volt is applied. The value of the resistor is:

Question 18

When an 8 ohm resistor is connected across a 12 volt supply the current flow is:

Question 19

A resistor with 10 volt applied across it and passing a current of 1 mA has a value of:

Question 20

If a 3 volt battery causes 300 mA to flow in a circuit, the circuit resistance is:

ANSWERS!!!!

Question 1

A 10 mA current is measured in a 500 ohm resistor. The voltage across the resistor will be:

Correct Answer: 5 volt

Question 2

A circuit has a total resistance of 100 ohm and 50 volt is applied across it. The current flow will be:

Correct Answer: 500 mA

Question 3

If a 4800 ohm resistor is connected to a 12 volt battery, the current flow is:

Correct Answer: 2.5 mA

Question 4

The current flowing through a resistor can be calculated by using the formula:

Correct Answer: I = U / R [current equals voltage divided by resistance]

Question 5

A current of 2 ampere flows through a 16 ohm resistance. The applied voltage is:

Correct Answer: 32 volt

Question 6

A current of 0.5 ampere flows through a resistance when 6 volt is applied. To change the current to 0.25 ampere the voltage must be:

Correct Answer: reduced to 3 volt

Question 7

The following formula gives the resistance of a circuit:

Correct Answer: R = U / I [resistance equals voltage divided by current]

Question 8

The voltage needed to cause a current of 4.4 ampere to flow in a 50 ohm resistance is:

Correct Answer: 220 volt

Question 9

The ohm is the unit of:

Correct Answer: electrical resistance

Question 10

A current of 5 ampere in a 50 ohm resistance produces a potential difference of:

Correct Answer: 250 volt

Question 11

The voltage across a resistor carrying current can be calculated using the formula:

Correct Answer: U = I x R [voltage equals current times resistance]

Question 12

If a 12 volt battery supplies 0.15 ampere to a circuit, the circuit's resistance is:

Correct Answer: 80 ohm

Question 13

This voltage is needed to cause a current of 200 mA to flow in a lamp of 25 ohm resistance:

Correct Answer: 5 volt

Question 14

I = U/R is a mathematical equation describing:

Correct Answer: Ohm's Law

Question 15

The resistor which gives the greatest opposition to current flow is:

Correct Answer: 0.5 megohm

Question 16

The value of a resistor to drop 100 volt with a current of 0.8 milliampere is:

Correct Answer: 125 kilohm

Question 17

A current of 0.5 ampere flows through a resistor when 12 volt is applied. The value of the resistor is:

Correct Answer: 24 ohms

Question 18

When an 8 ohm resistor is connected across a 12 volt supply the current flow is:

Correct Answer: 12 / 8 (answer in amps )

Question 19

A resistor with 10 volt applied across it and passing a current of 1 mA has a value of:

Correct Answer: 10 kilohm

Question 20

If a 3 volt battery causes 300 mA to flow in a circuit, the circuit resistance is:

Correct Answer: 10 ohm



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