Question

a 10-volt battery connected across a parallel combination of a 100 (ohm) fixed resistor and a variable resistor R. It can be shown that the total current in the circuit I (in amperes, A) is the following function of the variable resistor R (in ohms): I= ((100+R)/10R) If the variable resistance is decreased at a rate of 5 ohm/s, calculate the rate of change in the current with time when the variable resistance is 50 ohms.

Answer #1

Resistor R1=3.0 Ohm is connected in series to a parallel
combination of R2=9.0 Ohm and R3=7.0 Ohm. The combination of three
resistors is connected to a real battery of emf 12.0 V. Find
internal resistance of a battery if current through a battery is
0.40 A. Give answer in Ohms.

Resistor R1=3.7 Ohm is connected in series to parallel combination
of resistors R2=7.9 Ohm and R3=11.1 Ohm. Find equivalent resistance
of this combination. Give answer in Ohms.
Resistor R1=3.7 Ohm is connected in series to parallel combination
of resistors R2=7.9 Ohm and R3=10.7 Ohm. This combination is
connected to the ideal battery of V=10.6 V. Find current through
the R3. Give answer in A.

A
circuit loop contains a battery of 3.0V connected in series with a
parallel combination of two resistor which are a 100 Ohm resistor
and an unknown resistor R. The current through the battery is 50
mA. Draw the circuit diagram and find the value of the unknown
resistor R

A 63 V. battery is connected across a 63100 ohm and a 32400 ohm
resistor connected in series. What is the per cent error in the
voltmeter reading when placed across the first resistor, if the
voltmeter resistance is 186000 ohms?

A 66 V. battery is connected across a 64700 ohm and a 32800 ohm
resistor connected in series. What is the per cent error in the
voltmeter reading when placed across the first resistor, if the
voltmeter resistance is 125000 ohms?

A 63 V. battery is connected across a 60,205 ohm and a 30,711
ohm resistor connected in series. What is the per cent error in the
voltmeter reading when placed across the first resistor, if the
voltmeter resistance is 181,978 ohms?

A 3
ohm resistor is connected in parallel with a 6 ohm resistor. This
combination is connected in series with a 4 ohm resistor. The
resistors are connected to a 12 V battery. How muxh power is
dissipated in the 3 ohm resistor?

Consider a simple circuit with two resistors connected in
parallel.
R1 = 30.0 Ohm, R2 = 10.0 Ohm, and a 12 V battery
Calculate the following values to one decimal places (enter just
the number)
The equivalent resistance Ohms
The voltage across resistor R1 V
The voltage across resistor R2 V
The current through resistor R1 A
The current through resistor R2 A
Consider a simple circuit with two resistors connected in
series.
R1 = 1.0 Ohm, R2 = 7.0 Ohm, and a 12 V...

A parallel combination of an 4 resistor and an unknown resistor
R is connected in series with a 19 resistor and a battery. This
circuit is then disassembled and the three resistors are then
connected in series with each other and the same battery. In both
arrangements, the current through the 4 resistor is the same. What
is the unknown resistance R?

A 4 Ohm resistor is connected in series to a parallel connection
of a 5 Ohm and a 10 Ohm resistor. The combination is connected to a
23 V battery.
a) What is the current through the 5 Ohm resistor?
b) What is the power lost in the 4 Ohm resistor?
c) What is the potential difference across the 4 Ohm
resistor?

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