Answer:
(2) B and C
Explanation:
In B resistors are parallel
so
1/R = 1/R1 + 1/R2
= 1/8+1/8
= 2/8
so
R = 4 ohms
In C resistors are in series
so,
R= R1+R2
= 2+2
= 4
Answer : The correct options are, (B) a newton-meter and a joule and (C) a newton and a joule/sec
Explanation :
As we know that,

or we can say that,

From the given options, the option B and C are the equivalent units.
Hence, the correct options are, (B) and (C)
Answer:
We conclude that the quantity of the charge that flows through the wire in 50 s will be 45 C.
Explanation:
Given
To determine
We need to find the quantity of the charge that flows through the wire in 50 s.
Important Tip:
A current of 1 Ampere = 1 Coulomb of charge flowing in 1 second
Using the formula involving charge and current

where:
represents the current in amperes (A)
represents the charge in coulomb (C)
represents the time in seconds (s)
now substituting I = 0.9 and t = 50 in the formula


switch sides

Multiply both sides by 50

Simplify
C
Therefore, we conclude that the quantity of the charge that flows through the wire in 50 s will be 45 C.
Answer:
Older homes did not have the same safety requirements when they were constructed that newly built homes now have to meet; any preventative measures like smoke alarms were left up to the home owners.
Explanation: