The correct option is C. i.e. <span>Using more coils of wire
</span>
Explanation:
The strength of an electromagnet can be increased in the following ways:
1. By increasing the number of coils.
2. By increasing the current/voltage
3. Using an iron core, increases the strength of the electromagnet.
Answer:
13.12°
Explanation:
Parameters given:
Magnetic field strength, B = 0.350 T
Current in the wire, I = 3.5 A
Force per unit length, F/L = 0.278 N/m
The force on a wire due to the presence of a magnetic field is given as:
F = I*L*B*sinФ
where Ф = angle between the magnetic field and current
The force per unit length, F/L, will be:
F/L = I*B*sinФ
0.278 = 3.5 * 0.35 * sinФ
=> sinФ =
sinФ = 0.227
Ф =
Ф = 13.12°
The angle between the magnetic field and the current is 13.12°.
Answer:
C-3 I beleive it is three!!!!
Explanation:
Hope this helps!
Have a grreat day!
-Hailey
Answer:
Option (D)
Explanation:
n = 0.35,
Temperature of hot reservoir,
T1 = 427 C = 700 K
Temperature of cold reservoir, T2 = ?
Use the formula for efficiency of Carnot cycle
n = 1 - T2 / T1
0.35 = 1 - T2 / 700
0.65 = T2 / 700
T2 = 700 × 0.65
T2 = 455 K
I’m not very good at this subject but I’d say it’s A Boiling an egg