The magnifying power of a telescope with tube length 60  cm is 5 . What is the focal length of it...

Описание: The magnifying power of a telescope with tube length 60  cm is 5 . What is the focal length of its eye piece ?
[JEE Main-2020 (January)]
(1) 30  cm
(2) 10  cm
(3) 40  cm
(4) 20  cm

📲PW App Link - https://bit.ly/PW_APP
🌐PW Website - https://bit.ly/PW_APP

📌 PHYSICS WALLAH OTHER CHANNELS :

🌐 PhysicsWallah -Alakh Pandey:    / @physicswallah  
🌐 Alakh Pandey:    / @alakhpandey1414  
🌐 JEE Wallah:    / @jee_wallah  
🌐 Competition Wallah:    / @competitionwallah  
🌐 PW Foundation:    / physicswallahfoundation  
🌐 NCERT Wallah :    / @ncertwallahclass12pw  
🌐 Defence Wallah-NDA:    / @defencewallahpw  
🌐 PhysicsWallah English:    / @englishpw  
🌐 PW Vidyapeeth:    / @vidyapeethpw  
🌐 Commerce Wallah by PW:    / @commercewallahpw  
🌐 CA Wallah bt PW:    / @cawallahbypw  
🌐 PW Sarkari Exam:    / @pwsarkariexams  
🌐 PW - Hindi Medium:    / @physicswallahhindimedium  
🌐 PW Bangla:    / @pwbangla  
🌐 PW Maharashtra:    / @pwmaharashtra  
🌐 PW Telugu:    / @pwtelugu  
🌐 PW Kannada:    / @pwkannada  
🌐 PW Gujarati:    / @pwgujarati  
🌐 PW Facts:    / @pwfacts  
🌐 PW Insiders:    / @physicswallahinsider  
🌐 PW Little Champs:    / @pwlittlechamps  
🌐 PW Pathshala:    / @vidyapeethtalks  
🌐 Banking Wallah :    / @bankingwallah  
🌐 SSC Wallah :    / @sscwallahpw  
🌐 JEE Challengers by PW :    / @jeechallengersbypw  
🌐 UPSC Wallah :    / @pwonlyiasupsc  
🌐 UPSC Wallah हिन्दी :    / @pwonlyiashindimedium  
🌐 GATE Wallah :    / @gatewallahbypw  
🌐 GATE Wallah - EC,EE & CS :    / @gatewallah_ee_ec_cs_in  
🌐 GATE Wallah - ME, CE & XE :    / @gatewallah_me_ce_xe_ch  
🌐 GATE English :    / @gatewallahenglish  
🌐 College Wallah :    / @collegewallahbypw  
🌐 PW IIT JAM & CSIR NET :    / @pwiitjamcsirnet  
🌐 MBA Wallah :    / @mbawallah  
🌐 Teaching Wallah :    / @teachingwallahbypw  

📌 PHYSICS WALLAH SOCIAL MEDIA PROFILES :

🌐 Telegram : https://t.me/pwjeewallah
🌐 Facebook :   / physicswallah  
🌐 Instagram : https://www.instagram.com/pwjee_walla...
🌐 Twitter :   / physics__wallah  
🌐 Linkedin :   / admin  

📌 For any queries or complaints Visit : https://bit.ly/PW_Queries