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9A transformer can increase or decrease alternating voltage.
A step-down transformer has fewer turns in the secondary coil than in the primary coil.
A step-up transformer decreases the output voltage.
The ratio of primary voltage to secondary voltage equals the ratio of primary turns to secondary turns.
A transformer works with direct current (DC). $$False
In a step-up transformer, the secondary coil has more turns than the primary coil.
A transformer changes the frequency of an alternating current.
If the primary voltage is 220V and the secondary voltage is 12V, it is a step-down transformer.
The transformer formula is Vp/Vs = Np/Ns
Transformers are used only for electrical generators.
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Which of the following is the source of alternating current (a.c.)?
On which of the following principles is the working of a transformer based?
Which is the transformer’s formula?
A transformer that increases the output voltage compared to the input is called:
If V p=220V and Np:N s=2:1, the secondary voltage is:
The working principle of a transformer is based on:
Transformers work only with:
A step-up transformer has:
A step-down transformer has:
A transformer that reduces voltage is called:
A transformer that reduces voltage is called a ______-down_transformer.
A transformer that increases voltage is called a ______-up_transformer. .
The ratio of primary turns to secondary turns equals the ratio of ______ voltage to secondary voltage.
If a transformer has more turns in the secondary coil, it ______ voltage.
The working of a transformer is based on ______ induction.
In a step-down transformer, the secondary voltage is ______ than the primary voltage.
A 220V to 12V transformer is an example of a ______-down transformer.
Transformers only work with ______ current.
The electrical appliance “router” usually requires a transformer to ______ voltage.
if Np:Ns= 1:10 and Vp=220V, the secondary voltage is ______.