Indus Valley Civilization

1. 1. What
is
a
simpler
way
of
expressing:
(i)
0.000
005
A
and
(ii)
3
000
000
V?
2. A
potential
difference
(p.d)
of
6V
causes
a
current
of
0.6
A
in
a
conductor.
Calculate
the
resistance
of
the
conductor.
3. Find
the
p.d
required
to
pass
a
current
of
5A
through
a
conductor
having
resistance=8
Ohms.
4. A
960
Ohms
lamp
is
connected
to
a
240V
supply.
Calculate
the
current
in
the
lamp
and
its
power
consumption.
5. A
p.d
of
1.35V
causes
a
current
of
465
micro-­‐Amperes
to
flow
in
a
conductor.
Calculate
the
resistance
of
the
conductor.
6. An
accidental
short
circuit
to
a
240V
supply
is
caused
by
the
connection
of
a
component
of
8.5
milli-­‐Ohms
across
the
supply
terminals.
What
will
be
the
short
circuit
current?
7. What
is
the
voltage
across
an
electric
heater
of
5-­‐Ohms
through
which
passes
a
current
of
22A?
8. A
p.d
of
12V
is
applied
to
a
7.5-­‐Ohms
resistor
for
a
period
of
5
seconds.
Calculate
the
electric
charge
(in
Coulombs)
transferred
in
this
time
period.
9. A
voltage
of
20V
is
required
to
cause
a
current
of
2A
to
flow
in
a
resistor
of
resistance
10-­‐Ohms.
What
voltage
will
be
required
to
flow
the
same
amount
of
current
if
the
resistance
were
40-­‐Ohms.