Question

help me frds i need help​

Answer 1

Answer:

1.) (a) A volt is Joule per Coulomb.

Reason :

Potential Difference, Voltage = Work done / Charge

=> V = 1 Joule / 1 Coulomb

2.) (a) 20 Joules

Reason:

Given,

Potential difference, V = 128 V - 118 V = 10 V

Charge, C = 2 Coulomb

Let the work done be 'W'.

We know that,

V = W / C = W / 2

=> 10 = W / 2 => W = 20 Joules

3.) (d) None of these

Reason:

The resistance of the conductor depends on the following factors: The temperature of the conductor. The cross-sectional area of the conductor. Length of the conductor.

4.) True

Reason :

Since, by ohm's Law

R is directly proportional to V

And, R is inversely proportional to I

So, V is also inversely proportional to I.

5.) True

Reason:

The SI unit of electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. The ampere (symbol: A) is an SI base unit Electric current is measured using a device called an ammeter.

6.) True

Reason:

We know that,

Current = Charge / Time

=> I = C / t

=> 5 A = C / 10 => C = 50 Coulombs

7.) ____ = parallel

8.) _____ = p (rho)

Answer 2

Answer:

1) A volt is joule per coulomb

2) 20 jouls

3) none of these

4) True

5) True

6) True

i hope it will help u