Home
Class 12
PHYSICS
Assertion : A given transformer can be u...

Assertion : A given transformer can be used to step-up ot step-down the voltage.
Reason : The output voltage depends upon the ratio of the number of turns of the two coils of the transformer.

A

If both assertion ans reason are true ans reaason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion istrue but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    NCERT FINGERTIPS ENGLISH|Exercise Ac Voltage Applied To A Resistor|17 Videos
  • ALTERNATING CURRENT

    NCERT FINGERTIPS ENGLISH|Exercise Ac Voltage Applied To A Inductor|5 Videos
  • ALTERNATING CURRENT

    NCERT FINGERTIPS ENGLISH|Exercise NCERT|7 Videos
  • ATOMS

    NCERT FINGERTIPS ENGLISH|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

A step up transformer is used to

In a step-down transformer input voltage is 200 volts and output voltage 5 volt. The ratio of nubmer of turns in it will be -

In a step - down transformer, the number of turns in

Assertion : A step-up transformer changes a low voltage into a high voltage. Reason : This violate the law of conservation of energy.

Draw a schematic diagram of a step-up transformer . Explain its working principle . Deduce the expression for the secondary to primary voltage in terms of the number of turns in the two coils . In an ideal transformer , how is this ratio related to the currents in the two coils ?

Assertion : An ideal transformer does not vary the power. Reason : An transformer is used to step-up or step-down ac voltages.

A transformer is used to step up an alternating emf of 200V to 440V. If the primary coil has 1000 turns, calculate the number of turns in the secondary coil.

A thermal power plant produed electric power of 600kW at 4000V, which is to be transported to a place 20 km away form the power plant for consumer's usage. It can be transported either directly with a cable of large current carrying capacity or by sing a combination of step-up and step-down transfprmers at the two ends. THe drawback of the direct transmission is the large energy dissipation. In the method wsing transformers, the dissipatiion is much smaller. In this method a step-up transformers is used at the plant side so that the current is reduced to a smaller value. At the consumers'end, a step-down transformer is used to supply power to the consumers at the specified lower voltage. It is reasonable to assume that the power cable is purely resostive and the transformers are ideal with power factor unity. All the currents and voltagementioned are values. In the method using the transformers assume that the ratio of the number of turns in the primary to that in the secondary in the step-up transformer is 1:10 if the power to the consumers has to be supplied at 200V, the ratio of the number of turns in the primary to that in the secondary in the step-down transformer is

Assertion: The logic gate NOT can be built using diode. Reason: The output voltage and the input voltage of the diode have 180^(@) phase difference.

Assertion : X - rays can penetrate through the flesh but not through the bones. Reason : The penetrating power of X - rays depends on voltage.