There is a step-up transformer that doubles the voltage. if the primary coil has a voltage of 10 v, what will the voltage in the secondary coil be?
a)5 v
b)10 v
c)12 v
d)20 v
e)100 v
nvm lol free points !

20 V

Explanation:

A step up transformer has smaller number of turns in the primary coil as compared to secondary coils. A voltage supplied across a primary coil is induced to secondary coil and a higher voltage is produced.

It is given that a step-up transformer that doubles the voltage.

It is fed with 10 V voltage at primary. Thus, double voltage = 2 × 10 V = 20 V would be present in secondary coil.

Voltage in the secondary coil is 20 volts.

Explanation:

A step up transformer consists of primary coil and secondary coil. The number of turns in primary turns is less than the number of turns in secondary coil.

It is given that, a step-up transformer doubles the voltage. The primary coil has a voltage of 10 V. We need to find the voltage in the secondary coil. Let it is V'. So,

So, the voltage in the secondary coil be 20 volts. Hence, this is the required solution.

The correct option is (c).

Explanation:

Transformer is a device which increases or decrease the voltage of an  alternating current. The transformer consists of the secondary coil and the primary coil. It is used to transfer electrical energy by means of changing magnetic field.

Step-up transformer is used when the voltage of an alternating current is increased. The voltage in secondary coil is greater than that of the primary coil in this transformer.

Step-down transformer is used when the voltage of an alternating current is reduced.

Therefore, the correct answer is (c).

(i) 169.68 volt

(ii) 16.90 volt

(iii) 16.90 volt

(iv) 108.07 volt

(v) 2.161 A

Explanation:

Turn ratio is given as 10:1

We have given that input voltage

(i) We know that peak voltage is give by

(ii) We know that for transformer

So

So peak voltage in secondary will be 16.90 volt

(iii) Peak voltage of the rectifier will be equal to the peak voltage of the secondary

So peak voltage of the rectifier will be 16.90 volt

(iv) Dc voltage of the rectifier is given by

(v) Now dc current is given by

8000 turns

Explanation:

the relation between number of turns of primary and secondary coils and the respective voltages are given as

N1/N2=V1/V2

Where,

•N1 is no. of turns in primary coil

•N2 is no. of turns in secondary coil

•V1 is voltage in primary coil ie, Input voltage

•V2 is voltage in secondary coil ie, Output voltage

from the question we get,

V1=120 V

V2=9600 V

N1=100 turns

N2 = N1 x (V2/V1)

= 100 x (9600/120)

= 100 x 80

= 8000

So, No. of turns in secondary coil= 8000

a voltage in the secondary coil

a) No-Load Current will increase

b) The magnetising reactance will increase

c) The secondary voltage will decrease

Explanation:

a) when an air ap is made in the transformer core then more current is required for the magnetisation of core. Hence, no-load current will incraese.

b) with the air gap the magnetomotive force increases. As a result, the angle between the voltage and current increases. Consequently, power factor decreases. Power factor always decreases when the reactive behaviour of circuit incraeses. Hence, Magnetisation reactance will increase.

c) Secondary voltage decreases due to air gap. Therefore, it is said that with the air gap the efficiency of the transformer decreases.

Answerr

Explanation:

b

d:The voltage of the secondary coil is less than that of the primary coil.

The rms voltage (in V) measured across the secondary coil is 459.62 V

Explanation:

Given;

number of turns in the primary coil, Np = 375 turns

number of turns in the secondary coil, Ns = 1875 turns

peak voltage across the primary coil, Ep = 130 V

peak voltage across the secondary coil, Es = ?

The rms voltage (in V) measured across the secondary coil is calculated as;

Therefore, the rms voltage (in V) measured across the secondary coil is 459.62 V

pecialized keyboards

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.