Question

Two electric bulbs have resistances R and 3R respectively. They are connected in parallel to a power source of voltage V. If the two resistors are to be replaced by a single resistor. What will be the value of this resistor? *
1 point
a 0.75 R
b 1.33 R
c 4 R
d Insufficient information
please help

Answer 1

Explanation:

Correct option is

A

1 : 2

P=I

2

R

When two resistances are connected in series, current through them is same.

Hence,

P

2

P

1

=

R

2

R

1

=

2

1

Answer-(A)