Question

Determine the current that will flow when a potential difference of 33 v is applied between two ends of an appliance having a resistance of 110 Ω. if the same current is to flow through an appliance having a resistance of 500 Ω, how much potential difference should be applied across its two ends ? ​

Answer 1

Explanation:

Amitmaity

Amitmaity

24.10.2020

Physics

Primary School

answered

Example 4 : Determine the current that

will flow when a potential difference of

33 V is applied between two ends of an

appliance having a resistance of 110 ohm. If

the same current is to flow through an

appliance having a resistance of 500 ohm

how much potential difference should be

applied across its two ends?

1

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Explanation:

According to Ohm's law, V = IR. That is, R = V/I.

In this case, the voltage is 20 V and the current is 0.05 A.

So, the resistance R = 20/0.05 = 400 ohms.

Now, to make a current of 300 mA flow through the same resistor of 400 ohms, the potential difference to be applied is calculated as follows.

Here, I = 300 mA = 0.3 A and R = 400 ohms.

Therefore, V = 0.3*400 = 120 V.

Hence, to make a current of 300 mA flow through the same resistor of 400 ohms a potential difference of 120 V is applied.

Answer 2

$\huge\bf\red{Answer✓}$

V = 33 V and R = 110 Ω

In first case,

I = V/R = 33/110

:. I = 0.3 A

Current flowing through the appliance = 0.3 A

In the second case,

I = 0.3, R = 500 Ω

V = IR ,= 0.3 × 500 V = 150 V.

The required potential difference between its two ends = 150 V

Hope it help uh :)