W/S CALCULATION & SCIENCE

If a lamp is labelled 250W/5A, then rated voltage will be _____

• 50V

• 100V

• 150V

• 250V

A voltage of 220V is connected across a 1 K ohms resistor.The power consumption of lamp is ________

• 48.1W

• 48.2W

• 48.3W

• 48.4W

ohm's law is the relation between voltage(V), current(I) and resistance(R), according to which,______

• I=V/R

• V=I/R

• I=VR

• R=I/V

Given that voltage ( V ) = 3.6V & current (I)=0.2A. The resistance (R) by using Ohm's law is _____

• 0.18Ω

• 1.8Ω

• 18Ω

• 20Ω

The unit of current is Ampere. It is measured by_______

• Ammeter

• voltmeter

• ohmmeter

• Frequency meter

Electricity is a kind of ______

• Heat

• Energy

• Magnet

• Chemical

"Electric current" is classified as Direct current ( DC ) and _______

• Magnetic current

• Heating current

• Alternating current

• Chemical current

Resistance is the property of a substance due to which it opposes the flow if electric current. It's unit is ________

• Ohm

• Volt

• Ampere

• emf

Find the main supply Voltage (V) of iron box in Volt, if coil Resistance (R) =150Ω, Current I = 0.733A

• 55V

• 100V

• 110V

• 220V

A 6V bulb needs 0.5A current, find the resistance R.

• 12Ω

• 10Ω

• 3Ω

• 1.2Ω