ELECTRICITY TEST 1

Three resistors of 5ohm , 6ohm and 1ohm are connected in series. Which will get the maximum voltage

• 1ohm

• 5ohm

• 6ohm

• All get same voltage

A device rated 50W on 100V.

If this device is used on 50V. What changes will be seen in its power

• Power will increase

• Power will decrease

• Power remains same

Two resistors of 5ohm and 10ohm are connected in series to a battery of 120volts. What is the power of 10ohm device.

• 40W

• 80W

• 640W

• 320W

Two resistors of same resistance are connected, first in series and then in parallel, across the same battery. In which case is the heat produced in 1 minute greater

• Series

• Parallel

• Same in both

• Depends on resistance value

A bulb is rated 60 W, 220 V. If it is connected to 110 V supply, the power consumed will be:

• 15W

• 30W

• 60W

• 120W

In a parallel circuit with two unequal resistors R1 > R2 which resistor will get more current?

• R1

• R2

• Same in both

• Cannot be determined

A 12 Ω and 6 Ω resistor are connected in parallel across a 12 V battery. The ratio of power consumed by 12 Ω to that of 6 Ω is:

• 1:2

• 1:4

• 2:1

• 4:1

Two resistors of 10 Ω and 20 Ω are connected in series across a battery. The heat produced in each resistor after the same time interval will be in the ratio:

• 1:1

• 1:2

• 2:1

• 4:1

Three resistors 2 Ω, 3Ω, 6Ω are connected in parallel across a 6 V battery. Which resistor will have the maximum power consumption

• 2ohm

• 3ohm

• 6ohm

• Same in all

If the current through two different resistors connected in series is compared, it will be:

• More in smaller resistor

• Less in smaller resistor

• Same in both

• Zero in both