EASY
CUET (UG)
IMPORTANT
Earn 100

In a step-up transformer, the input voltage is 300 V and the output voltage is 15 kV. Then the ratio of the number of turns in the primary to that in the secondary is,

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Important Questions on Alternating Current

EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 75
A step-down transformer has turn ratio 20:1. If 8 V is applied across 0.4 Ω secondary then the primary current will be
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 76
Which quantity is increased in a step-down transformer?
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 77
The core of a transformer is laminated so that:
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 78

What is the input power for an ideal transformer having ratio of the secondary to the primary turns 3:2 and the output power P ?

EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 79
A transformer connected to 220 V line shows an output of 2 A at 11000 V. If the efficiency of the transformer is 100%, then the current drawn from the line is: