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. A current of 2 A flows through the wire. What are the potentials on each quarter of the wire if the potential of the negative pole of the source is 
?
per meter of length, we want to make a resistor with resistance 
. How much wire do we need? If we wind the wire around a cylinder with a radius of 1.5 cm, how many threads will the wire have?
or Ohm.
flows through a resistor with a 
resistance. What is the voltage across the resistor?
on the other side. A current of 
flows through the resistor. Determine the direction of the current and the size of the resistor.
and its internal resistance is 
. Calculate the resistance of each of the resistors if the ammeter is to measure a current of:
when switch 1 is closed and 2 is open.
when switch 2 is closed and 1 is open.
are connected in series. What is the total resistance R of this connection?
from a copper wire with a diameter of 
. How much wire will be needed if the resistivity of copper is 
?
of copper is pulled into a 
thick wire. What will be the resistance of this wire?
and it's resistivity is 
.
are connected in parallel. What is the total resistance R of this connection?
. The resistance of the second resistor is 
. What is the resistance of the first resistor if the current flowing through the circuit is 
?
is divided into two parts. The lengths of the two parts of the wire are in the ratio 
. Calculate the resistance of the longer part of the wire.
and 
are connected to a voltage source 
.
and 
are connected to a voltage source. What is its voltage if the voltage across the smaller resistor is 
. How much current flows through the larger resistor?
voltage source. What is the resistance of each resistor if a current of 
flows through the source?
. A current of 
flows through the source. What is the resistance of each resistor?
. The circuit is connected to a voltage of 
.
, are connected to a voltage of 
, as shown in the figure below.
and 
are connected to a voltage of 
as shown in the circuit diagram below.
if the internal resistance of the voltmeter is 
?
and a voltmeter of internal resistance 
as shown in the figure below.
and the voltmeter shows a voltage of 
?
resistor is measured with an ammeter whose internal resistance is 
as shown in the figure below. The voltage of the source is 
. What is the measurement shown by the ammeter and voltmeter?
and a measuring range of 
if we want to measure a voltage up to 
?
resistor and we connect them to a voltage of 24 V. Draw the circuit diagram. Will the fuse blow? What happens when a fuse blows?
flows through a copper wire. Calculate the heat energy lost in the 
wire in half an hour.
.
, the specific heat of copper is 
, and the resistivity of copper is 
.
