Question 1
A 10 mA current is measured in a 500 ohm resistor. The voltage across the resistor will be:
5 volt
50 volt
500 volt
5000 volt
Question 2
A circuit has a total resistance of 100 ohm and 50 volt is applied across it. The current flow will be:
50 mA
500 mA
2 ampere
20 ampere
Question 3
If a 4800 ohm resistor is connected to a 12 volt battery, the current flow is:
2.5 mA
25 mA
40 A
400 A
Question 4
The current flowing through a resistor can be calculated by using the formula:
I = U x R [current equals voltage times resistance]
I = U / R [current equals voltage divided by resistance]
I = U + R [current equals voltage plus resistance]
I = U - R [current equals voltage minus resistance]
Question 5
A current of 2 ampere flows through a 16 ohm resistance. The applied voltage is:
8 volt
14 volt
18 volt
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:
increased to 12 volt
reduced to 3 volt
held constant
reduced to zero
Question 7
The following formula gives the resistance of a circuit:
R = I / U [resistance equals current divided by voltage]
R = U x I [resistance equals voltage times current
R = U / R [resistance equals voltage divided by resistance]
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:
2220 volt
220 volt
22.0 volt
0.222 volt
Question 9
The ohm is the unit of:
supply voltage
electrical pressure
current flow
electrical resistance
Question 10
A current of 5 ampere in a 50 ohm resistance produces a potential difference of:
20 volt
45 volt
55 volt
250 volt
Question 11
The voltage across a resistor carrying current can be calculated using the formula:
U = I + R [voltage equals current plus resistance]
U = I - R [voltage equals current minus resistance]
U = I x R [voltage equals current times resistance]
U = I / R [voltage equals current divided by resistance]
Question 12
If a 12 volt battery supplies 0.15 ampere to a circuit, the circuit's resistance is:
0.15 ohm
1.8 ohm
12 ohm
80 ohm
Question 13
This voltage is needed to cause a current of 200 mA to flow in a lamp of 25 ohm resistance:
5 volt
8 volt
175 volt
225 volt
Question 14
I = U/R is a mathematical equation describing:
Ohm's Law
Thevenin's Theorem
Kirchoff's First Law
Kirchoff's Second Law
Question 15
The resistor which gives the greatest opposition to current flow is:
230 ohm
1.2 kilohm
1600 ohm
0.5 megohm
Question 16
The value of a resistor to drop 100 volt with a current of 0.8 milliampere is:
125 ohm
125 kilohm
1250 ohm
1.25 kilohm
Question 17
A current of 0.5 ampere flows through a resistor when 12 volt is applied. The value of the resistor is:
6 ohms
12.5 ohms
17 ohms
24 ohms
Question 18
When an 8 ohm resistor is connected across a 12 volt supply the current flow is:
12 / 8 (answer in amps )
8 / 12 (answer in amps )
12 - 8 (answer in amps )
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:
10 ohm
100 ohm
1 kilohm
10 kilohm
Question 20
If a 3 volt battery causes 300 mA to flow in a circuit, the circuit resistance is:
10 ohm
9 ohm
5 ohm
3 ohm
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